Make block format possible for workbook.close

[ghost]

Hi.

workbook = WriteExcel.new('ruby.xls') # Step 1
worksheet = workbook.add_worksheet # Step 2
worksheet.write('A1', 'Hi Excel!') # Step 3
workbook.close

I believe the .close could be eliminated, just as
it is possible in

File.open() {

}

Simply use a block style, like so:

WriteExcel.new('ruby.xls') { # Step 1
worksheet = add_worksheet # Step 2
worksheet.write('A1', 'Hi Excel!') # Step 3
}